"Round" soft triode radio valve

Round' soft triode radio valve, with three filaments (intact)

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Round' soft triode radio valve, with three filaments (intact)
Science Museum Group
© The Board of Trustees of the Science Museum

"Round" soft triode radio valve, with three filaments (intact), c.1915

Details

Category:
Electronic Components
Object Number:
1980-1762
type:
radio valve
credit:
Milne, A.O.